Connecting rod for radial engines



Oct. 13, 193.1. P. P. NIEWCOMB 1,827,436

v I CONNECTING ROD FOR RADIAL ENGINES l r vFl'illired Sept. l0, 1929nulli-.lull

/27 /19 Bv 2a 'L-J ""f ATTORNEY.

connecting rod 10 has usually been formedntcgrally, the Crank Shaftbeing med@ ill WQ, principal tclescepng parts S0, thatvthey @all beassembled through the opening 14 provided in the rod 10 for the crankpin. 1n the present improved form of master rod the crank end isma'de.in two closely associated parts.v

One half of the crank end is formed integrally With the master rod 10,`the other lialfl being in the form of a strap hinged thereto in aVmanner presently to be described.

The hinged strap member 15 of the rod 10 has flanges 16 similar toiianges 11 ofthe rod. At one side of the rod 1G Vand hinged member 15these flange-s 11y and 16 are cut away as indicated in Fig. 3 so thatthey may overlap each other. A pinA 13 extends through aligned openingsin .these cut away portions so that the member 15 may swing about themaster rod lOupon one of the pins 13. By this means the connecting rod10 may have its Vcrank end fitted' about the crank pin of the engineafter the. crank has been mounted and hnally assembled in place.

The pins 13 for ip'ivotall-y attaching the articulating rods 12 and'also thatfor forming the pintle for the hinge are preferably hol# lovvasV shown most* clearly in Fig. 4. At one end isv formed a small flange17 "limiting the movement of: the pin 13 in one direction'. InsertedWithin theopposite end of the pin l 13 isa threaded stud 18 having ahead adapted to' lie against a portion of the'flange onl the hingeportion 15. This stud 18f'th'readed-lyengages internal threads Withinthepin 13.

`*In order to hold the strap portion 15 in position against the endofthemain portion 10 ofthe" master rod, links or strapsf19- are provided. Oneof these straps 19 may be positioned on each face of the rod 10,preferablythe flanges 11 and'lbeing Vrecessed slightly to accommodatethe links. Holes are provided adjacent each end of the vstraps 19through Which pins 13 may extend and hold the ,strapsin position. ltWill be noted that the straps 19 lie closely against the faces of the:master'rod 10 andstrap member 15 hinged theretoandserve to` keepjthese1parts in correct alignment. A. doyvel pin 20 may alsoV beprovided'enteringV the master rod- 10 and the strap member 15 from the adjacentsurfaces ofthese members. i

To dranr up the hinged strap member 15 against'the rod 10 and hold thesemembers firmly against'eachotlieror against shims injtroducved` betiveenthem, special tightening meansmaybe Aprovided operating to force thelinks into their operative position. In

near/,43e

22 isy ofsmaller 'diameter` than the'eccentric surface 21 to enablewtheVpin to, be assembled in pesitijonthrough the links 19v but has its axisin alignment vvith the surface 21.

1 Rotation of this. specially formed pin 13 with the eccentric surfaces21 and 22 therefore serves to drawl the surfaces ofthe master rod 10 andthe hinged strapnnemberl tow-ard each other so that. they are forced'closely againsteach other. '17o eect this rotation. of the pin 13 -aWrench maybe inserted in the small holes 23- in the flanged head 17ofthe pin 13. Similar holes 2li are provided Within the heads of thestud-s 18 for similarlyr tightening these studs 18 Within. their'pins13.

To hold the pin13 with the eccentricf surfaces 21 and 22 in its adjustedrotative position, arcuate notches or recesses may bev cut in theperiphery of its Harige 1"? as shown at 25. TWhenY this pin 13 has. beenrotatedto its final assembled position, a screwL 2.6 may ff terrod: VInthis embodiment apin28 fitting the holes'in.A the flanges 11 ofthemaster rod 10wand fitting also the articulating Yrod 1,2 in

v the usual manner has its ends taperedslightly las shown. rEhe endsofthe` links-19 fitting overl'thispin 28 `h'aveftheir holescorrespondingly tapered. The length of the,linl. s .19bc. tweenthe holesfor the pins13and24e is of exactly; the proper length to, draw. the.StB-2LP member 15 against the rod` 10 when they are intheriinalposition. Toe draw the-links. 19 together., a` stud or screw 29 isprovided` havinga head. engaging the-outerface ofthel `strap 19. nut30enzgages the inner end ofthe sereni` 2.9and is flansedsetlwt itensases'rer the link 19011 theoppositelside. u f 1 In Fig, i6 shawn,@ether moddform ot the iarentioa IWhih Sosie' Of. the 0bjects oftheinyention'are obtained. YT he masterrod 31 la hinged strap fmember 32hinged by means of one ofl thepins 33 for pivotally 'connecting thearticulating rods, not'shofvvn.' This strap portion 32-has' its f-reeend held against the master rodI 31 by means of boltbwr screw hold thestrap member 32 in position andagainstlateral movement, aboss 35 isprovided on the strap member'32 which enters fa correspond- Y' inn'lyformed recess 4in the'ma'ster rod 31.

`l/Vhat I claim is: l v

l. A connecting-rod construction comprising in combination, 'a masterrod, a strap vmember on o'ne'e'nd of said master rod, aplur.-

rality of articulating rods, pins pivotally coni necting saidarticulating rods toisaid master f rod and'fto saidv strap member, ahinge coning in combination, a'master rod, a strapV member on one end ofsaid masterrod',a plurality of articulating rods, pins pivotallyvconnecting said .articulating rods to said master rod and to said strapmember, a hinge con-V Y nection between said'strap member and mas terrod on one side, and link members connecting the oppositeside of saidstrap mem-` f ber to said master rod. v Y

3. A connecting rod construction comprising in combination, a masterlrod, a strap member on one end of saidmaster rod, a plurality ofarticulating rods, pins" pivotally connecting said articulating rods tosaid massaid strap member, one ofsaid pins mounting said links havingeccentric surfaces whereby rotation of said latter pin will force saidstrap `memberagainst the end of said master rod;v p y 6. A connectingrod connection comprising incombination, a master rod, a strap member onone end of saidmaster rod, con# nections on said master'rod and strapmem-,- V

ber adapted to pivotally attach articulating links individually thereto,and means con-fV y'necting said masterrod and strap member rigidlytogether, said means including links extending between said master rodvand strap membery and engaging over connections for said articulatinglinks. l

7. A connecting rod connection compris- :ing in combination, a masterrod, a strapl A y,

member Von one end of said master rod, connections on said master rodand strap member adapted to pivotally attach articulating linksindividually' thereto, and means connecting said master rod and strapmember rigidly together, said means including overlapping portionsonsaid master rod and said ystrap member andhaving a connection foranarticulating link passing therethrough.

vIn testimony. whereof, I hereto aix my signature. s Y

',PiiiLii? r. NiawooMB.

ter rod and to said strap member, a hinge con- Y nection betvireensaid'rstrap member and mas-` ter rod on one side of said strap member, and

link members connecting the oppositeV side of said strap member to saidmaster rod,

said links being' held iny place by pins for said articulating rods uponsaid master rod and strap member.

l.v A connecting rod construction compris-V v ying in combination, akmaster rod, a *strap memberon one end of said master rod, a vplu-yrality of articulating rods, pins pivotally con-4 nectingsaidfarticulatingrods to -said master rod and to said strap member, ahinge conica n .y lie nection between said strap member Aand inas-V ytergrod' on 'one side, and llink members confr-` 'necting the oppositeside of` said strap mem-y ber to said master rod, said 4links beingmounted Von adjacent,v pins,` for connecting articulating rods to saidmaster rod and to said strapmember.

5. A connecting lrod constructioncomprising in combination, amaster rod,a "strap,

memberY on one end of'said master rod, a plu- Y rality of articulatingrods, pins pivotally con- 4necting said articulating rods to said masterrod and to said strap member, a billigek connection between said strapmember andmasf v ter rod on one side, and link members connectingtheopposite side oflsaid strap memi mounted on adjacent pinsVlr forconnecting "'articulatingrds to said master rodandto 'y ber to saidmasterV rod, said linkslbeing v l iso

